Ross, Waldron Air Systems Reverse Roll Coating Station

60" Waldron / Ross Air Systems reverse roll coating station.
3-roll system.
Reverse roll coaters meter an accurate thickness
of coating between two precision chilled iron rolls & apply the pre-metered coating
to the web.
The amount of coating applied is controlled
by the opening between the metering & applicator rolls & by the speed
of the applicator roll which rotates reverse to the web. Water-based coating.
(2) chilled iron rolls, (1) rubber-covered backing roll.
Wedges for precision micrometer adjustment between metering rolls & backing roll.
Reverse roll coating stations apply a wide range of coatings in viscosities
of 50 to 200,000 CPS, from 100% to less than 10% solids.
Servo driven motorized wedge block gap adjustment between applicator roll & metering roll.
Applicator roll can be controlled automatically through gauging system.
Automatic running adjustment of coat weight applied. Applicator roll is fixed.
Metering roll is air-loaded against the applicator roll.
Backing roll is air-loaded against the applicator roll.
Gap adjustment between backing roll & applicator roll is done manually.
Gap adjustment between metering roll & applicator roll is done remotely
with servo drives.
Drives are sized for up to 200 FPM.
Metering & applicator rolls 10" dia., chilled iron accurately ground to a T.I.R. of .00015
or better & mounted in precision anti-friction bearings.
These (2) rolls are positioned to form a coating fountain consisting
of the rolls & a slurry box where coating is put.
Applicator roll is fixed in position & the metering and backing rolls are adjusted to it.
Backing roll is 12.5" dia., elastomer covered.
On top of the coating station is a pre-metering system which can be used
if needed or can be removed.
Pre-metering system allows pre-metering of coating material before
it goes into the damn for the 3-roll reverse roll coating station.
Originally had gap control between the applicator & metering roll
and this was done through a Beta gauge system.
(2) servo motors with controllers to control the gap adjustment.
Schmidt couplings are provided for the metering roll, applicator roll & backing roll.
Dodge reducers.
Reliance variable speed AC Vector drives.
460 volt, 3 phase, 60 cycle.
(4) motors; (3) 5 HP & (1) 15 HP Reliance motors, AC variable speed.
Each roll in this system has a drive motor.
All rolls are 66" wide.
(3) spare rolls, (1) applicator roll, (1) metering roll & (1) backing roll.
Machine is in excellent mechanical condition.